Hydrated CO3-Bearing Analog of Manganoeudialyte from Alkali Pegmatites of the Konder Pluton, Khabarovsk Krai

A. A. Antonov, T. L. Panikorovskii, A. A. Zolotarev

Research output

Abstract

The chemical composition, crystal structure, and infrared (IR) spectrum of a hydrated CO3-bearing analog of manganoeudialyte from alkali pegmatites of the Konder pluton (Khabarovsk krai) are studied. The chemical composition of the mineral corresponds to the formula N[Na6.94H2O5.13(Y,REE)0.58. Pb0.31K0.28Ba0.08]13.32M1[Ca5.09Sr0.89]5.98M2[Mn1.523+Ti0.21Mg0.04Fe0.033+Al0.02]1.82M3(Si1.16Nb0.47)1.63 M4(Si)0.50. Z[Zr3.04Hf0.03]3.07(Si3O9)2(Si9O27)2(CO3)0.28 X[(H2O)4.45OH0.04Cl0.03]4.52. The IR spectrum contains the following lines (s, strong; sh, shoulder): 455s, 475s, 655, 740s, 925s, 977s, 1010s, 1145, 1420sh, 1504, 1650, 2970sh, 3240sh, 3480 cm–1. The crystal structure is refined in the R3 ¯ m spatial group, a = 14.243(3), c = 30.371(6) Å, and V = 5336(2) Å for 1393 independent reflections (|Fo| > 4σF with a similarity factor R1 of 6.5%. The deficit in Na and Cl, the presence of Pb and Ba, and the high degree of hydration of the mineral indicates postcrystallization ion-exchange processes typical of hydrothermal alteration of aegirine–albite rocks of the Konder pluton.

Original languageEnglish
Pages (from-to)726-735
Number of pages10
JournalGeology of Ore Deposits
Volume60
Issue number8
DOIs
Publication statusPublished - 1 Dec 2018

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Scopus subject areas

  • Geology
  • Geochemistry and Petrology
  • Economic Geology

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